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2 protocols using tcmk 1

1

Cell Culture Techniques for Aging and Fibrosis

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TCMK-1, HEK-293T, and RAW264.7 macrophage were acquired from the American Type Culture Collection (Manassas, VA). TCMK-1, HEK-293T and RAW264.7 cells were cultured in DMEM (Sigma-Aldrich) containing 10% fetal bovine serum (FBS) and incubated at 37 °C in a humidified atmosphere of air/CO2 (95:5). For IL-1β-induced aging research, TCMK-1 and HEK-293T were incubated in MEM medium supplemented with different doses of IL-1β for 24 h. For assessing the treatment effect of IL-1β antibody, cells were treated with IL-1β (5 ng/ml) or cell culture supernatant with IL-1β antibody (5 µg/ml) at the same time for 24 h. For TGFβ-induced fibrosis research, HEK-293T and primary tubular epithelia cells were exposed to TGFβ (20 ng/ml) for 48 h. For plasmid transfection research, gene-expressing plasmid and blank plasmid (pVector) were obtained from MiaoLing Plasmid (Wuhan, China). TCMK-1 and HEK-293T cells transfection with plasmids was conducted using Lipofectamine 2000 (12566014, Invitrogen, CA, USA) for 24 h, according to the manufacturer’s instructions.
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2

Hypoxia-Reoxygenation and Oxidative Stress in Kidney Cells

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The TCMK-1 (murine tubular epithelial cells) and human kidney 2 (HK2) (proximal tubular cells) cell lines were obtained from the American Type Culture Collection (ATCC; Manassas, VA). Cells were cultured in Dulbecco's modified Eagle's medium/F12 (Thermo Scientific, Rockford, IL) supplemented with 10% fetal bovine serum (Thermo Scientific) at 37 °C in 5% CO 2 . For H/R research, confluent TCMK-1 or HK2 cells were incubated under hypoxic conditions (1% O 2 , 94% N 2 , and 5% CO 2 ) in a controlled hypoxic chamber (Thermo Scientific) for 24 h, and then removed or not to a normoxic incubator for reoxygenation. Normoxic controls were cultured under normoxic conditions (21% O 2 , 5% CO 2 , 74% N 2 ) for identical times. For the H 2 O 2 study, confluent TCMK-1 cells were exposed or not to H 2 O 2 at different doses for 24 h. In certain experiments, cells were pre-administered different doses of recombinant Klotho protein or 30 µM N-acetylcysteine (NAC; Sigma-Aldrich) for 1 h.
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